Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '6a82feb40615cfa42318c5dd46de3ab7145e83e75f45257bfe760dd9a814f5ee' 
  AND token = '6Tt7MqQAJTxCnOJycA6cwjQ3Pc3p4X1+BLoBepiHqrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}